Is it possible to obtain the final output from a spawned process in expect using variable tracing?

Consider the following script, mostly copied for the book Exploring Expect

Trying to run commands after logging into a remote server using expect

use expect command to configure zyxel accesspoint

I can configure my Accesspoint via console and now I want to do this bulk via expect command. It does not work and i suspcect that the problem is that expect does not like : in variables.